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PayPal cofounder and rocket maker Elon Musk keeps getting himself into the news. Sometimes he gets notice for his new products and projects, but he is also famous as a kind of self-appointed spokesman for the techno-future.

The X Window System, which dates to the 1980s, still forms the basis of Linux's graphical user interface, but it does cause some despair among developers with its legacy ballast and outmoded technology. Wayland and Mir are two promising candidates for the changing of the guard.

Many Linux users employ Secure Shell to log in remotely and work as if on a local machine. But SSH can do even more – the application will send commands, route other TCP connections through an encrypted tunnel, and provide multiplexing support.